【Ampu New】Announcement of Cash Dividend Ex-dividend Record Date

1. Date of Board of Directors' or Shareholder Meeting Resolution or Company Decision: 115/04/23 (April 23, 2026) 2. Type of Ex-rights/Ex-dividend (Please fill in "Ex-rights", "Ex-dividend" or "Ex-rights and Ex-dividend"): Ex-dividend 3. Type and Amount of Common Stock Dividend: Common stock cash dividend of NT$442,500,000 (NT$3 per share) 4. Ex-rights (Ex-dividend) Trading Date: 115/08/04 (August 4, 2026) 5. Last Transfer Date: 115/08/05 (August 5, 2026) 6. Start Date of Suspension of Transfer: 115/08/06 (August 6, 2026) 7. End Date of Suspension of Transfer: 115/08/10 (August 10, 2026) 8. Ex-rights (Ex-dividend) Record Date: 115/08/10 (August 10, 2026) 9. Last Date for Bond Conversion Application: Not applicable 10. Start Date of Suspension of Bond Conversion: Not applicable 11. End Date of Suspension of Bond Conversion: Not applicable 12. Common Stock Cash Dividend Payment Date: 115/8/31 (August 31, 2026) 13. Other Matters to be Specified: None.